LR8555 applicationl LR8555 typical application circuit LR8555 typical performance characterilticl LR8555 series is a group of positive voltage output low power consumption,low dropout voltage regulator. LR8555 can provide output value in the range of 1.2~5v every 0.1v step.it also can be customized on command. LR8555 includes high accuracy voltage reference,error amplifier,current limit circuit and output driver module. LR8555 has excellent load and line transient response and good temperature characteristcs,which can assure the stabllity of chip and power system.and it uses trimming technique to output voltage accuracy with 2%. LR8555 is avilable in sot23-5,sc70-5 packages which is lead free.it also can available in these packages with lead. featurel leshan radio company, ltd. leshan radio company, ltd. low noise 150ma ldo regulator 1/9 LR8555-1.8v output ce v dd v out gnd in out cap cap LR8555 + + cellular voltage voltage
pin delcription pin number symbol function sc-70-5 sot-23-5a sot-23-5b product clallification output voltage pagkage type produgt name pagkage type produgt name pagkage type produgt name 1.2v s ot - 2 3-5a LR8555-1 2p ra s ot - 2 3-5b LR8555-1 2p rb sc-70-5 LR8555-1 2p q 1. 5 v s ot - 2 3-5a LR8555-15 p ra s ot - 2 3-5b LR8555-15 p rb sc-70-5 LR8555-15 p q 1. 8 v s ot - 2 3-5a LR8555-18 p ra s ot - 2 3-5b LR8555-18 p rb sc-70-5 LR8555-18 p q 2.1v s ot - 2 3-5a LR8555- 2 1 p ra s ot - 2 3-5b LR8555- 2 1 p rb sc-70-5 LR8555- 2 1 p q 2. 5 v s ot - 2 3-5a LR8555- 2 5 p ra s ot - 2 3-5b LR8555- 2 5 p rb sc-70-5 LR8555- 2 5 p q 2. 8 v s ot - 2 3-5a LR8555- 2 8 p ra s ot - 2 3-5b LR8555- 2 8 p rb sc-70-5 LR8555- 2 8 p q 3 . 0 v s ot - 2 3-5a LR8555-30 p ra s ot - 2 3-5b LR8555-30 p rb sc-70-5 LR8555-30 p q 3 .2v s ot - 2 3-5a LR8555-3 2p ra s ot - 2 3-5b LR8555-3 2p rb sc-70-5 LR8555-3 2p q 3 . 3 v s ot - 2 3-5a LR8555-33 p ra s ot - 2 3-5b LR8555-33 p rb sc-70-5 LR8555-33 p q 3 . 5 v s ot - 2 3-5a LR8555-35 p ra s ot - 2 3-5b LR8555-35 p rb sc-70-5 LR8555-35 p q 5 . 0 v s ot - 2 3-5a LR8555-50 p ra s ot - 2 3-5b LR8555-50 p rb sc-70-5 LR8555-50 p q selection guide LR8555 xx x x pin allignment LR8555 LR8555 LR8555 leshan radio company, ltd. leshan radio company, ltd. 2/9 123 54 7 8 9 : sc70-5 123 54 7 8 9 : sot23-5
product marking information: block diagram leshan radio company, ltd. leshan radio company, ltd. 3/9 123 54 7 8 9 : sc70-5 123 54 7 8 9 : sot23-5a 123 54 7 8 9 : sot23-5b 7 8 9 : output current & en availability output voltage year of manufacturing week of mannufacturing for example: LR8555 with output current 150ma,sot23-5 package with an en pin its position 7 is c 9 the year of manufacturing: "5" stands for year 2005, "6" stands for year 2006,and " 0 " for year 2010. code iout en code iout en a 50ma no a 50ma yes b 100ma no b 100ma yes c 150ma no c 150ma yes d 200ma no d 200ma yes e 250ma no e 250ma yes f 300ma no f 300ma yes g 350ma no g 350ma yes h 400ma no h 400ma yes i 450ma no i 450ma yes j 500ma no j 500ma yes code week of mfg code week of mfg code week of mfg code week of mfg code week of mfg a1l12w23 h 34 s 45 b2m13x24 i 35 t 46 c3n14y25 j 36 u 47 d4o15z26 k 37 v 48 e5p16 a 27 l 38 w 49 f6q17 b 28 m 39 x 50 g7r18 c 29 n 40 y 51 h8s19 d 30 o 41 z 52 i9t20 e 31 p 42 j10u21 f 32 q 43 k11v22 g 33 r 44 : code vout code iout code iout 2 1.2v 7 2.7v 2 4.2v 3 1.3v 8 2.8v 3 4.3v 4 1.4v 9 2.9v 4 4.4v 5 1.5v 0 3.0v 5 4.5v 6 1.6v 1 3.1v 6 4.6v 7 1.7v 2 3.2v 7 4.7v 8 1.8v 3 3.3v 8 4.8v 9 1.9v 4 3.4v 9 4.9v 0 2.0v 5 3.5v 0 5.0v 1 2.1v 6 3.6v 2 2.2v 7 3.7v 3 2.3v 8 3.8v 4 2.4v 9 3.9v 5 2.5v 0 4.0v 6 2.6v 1 4.1v 7 8 + - ce v dd v out gnd vref current limit
ablolute maximum ratingl recommended work conditionl item min recommended max unit electrical characterilticl LR8555, for arbitrary output voltage symbol parameter conditionl min typ max unitl vout vin*vout vout iout leshan radio company, ltd. leshan radio company, ltd. 4/9 vout t*vout llim short current limit
electrical characterilticl by output voltage dropout voltage, v dif (v) output voltage vout (v) condition typ. max. typical application circuit application hintl leshan radio company, ltd. leshan radio company, ltd. 5/9 ce v dd v out gnd in out cap cap LR8555 + +
typical performance characterilticl 1) output voltage vl. output current (with output lhort protection) 2) output voltage vl. input voltage 3) dropout voltage vl. output current 4) supply cur rent vl. input voltage LR8555-1.8v LR8555-1.8v leshan radio company, ltd. leshan radio company, ltd. 6/9 LR8555-1.8
5) ripple rejection vl. frequency 6) line tranlient relponle 7) load tranlient relponle vin vout iout = 50ma iout = 100ma vout leshan radio company, ltd. leshan radio company, ltd. 7/9
sot23-5 leshan radio company, ltd. leshan radio company, ltd. 8/9
sc70-5 millimeters inches dim min max min max a 1.80 2.20 0.071 0.087 b 1.15 1.35 0.045 0.053 c 0.80 1.10 0.031 0.043 d 0.10 0.30 0.004 0.012 g 0.65 bsc 0.026 bsc h ? 0.10 ? 0.004 j 0.10 0.25 0.004 0.010 k 0.10 0.30 0.004 0.012 n 0.20 ref 0.008 ref s 2.00 2.20 0.079 0.087 notes: 1. dimensioning and tolerancing per ansi y14.5m, 1982. 2. controlling dimension: millimeters. leshan radio company, ltd. leshan radio company, ltd. 9/9
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